997829929 has 2 divisors, whose sum is σ = 997829930. Its totient is φ = 997829928.

The previous prime is 997829869. The next prime is 997829971. The reversal of 997829929 is 929928799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 836539929 + 161290000 = 28923^2 + 12700^2 .

It is a cyclic number.

It is not a de Polignac number, because 997829929 - 2¹⁹ = 997305641 is a prime.

It is not a weakly prime, because it can be changed into another prime (997824929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498914964 + 498914965.

It is an arithmetic number, because the mean of its divisors is an integer number (498914965).

Almost surely, 2^997829929 is an apocalyptic number.

It is an amenable number.

997829929 is a deficient number, since it is larger than the sum of its proper divisors (1).

997829929 is an equidigital number, since it uses as much as digits as its factorization.

997829929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 64.

The square root of 997829929 is about 31588.4461314576. The cubic root of 997829929 is about 999.2761191229.

The spelling of 997829929 in words is "nine hundred ninety-seven million, eight hundred twenty-nine thousand, nine hundred twenty-nine".